good gracious, sabbath is bad enough, we don't need 18 turns worth of it.... Actually, in an arena deck, you get up to 54 turns worth of denial (3x draw, 6 of these, 6 sabbaths).
Its a just bit too much power right now.
Perhaps in the future it could be a good addition though.
If we had more ways to generate quanta outside of permanents then this could be a thing. We're better off than vanilla, but I still think we need a few more quanta generator options before the meta will be ready for this.